Los Angeles County Supervisors are scheduled to vote Tuesday on zoning regulations that would allow NBCUniversal to expand its Hollywood theme park and add more movie and television production facilities.

The company has proposed spending nearly $1.6 billion to construct nearly 2 million square feet of studio and office space at its Universal Studios Hollywood. Additions would include two 500-room hotels, a new ramp and other improvements to the 101 Freeway and a Harry Potter ride.